Mishnah Yoma משנה יומא Rabbi Mike Feuer, Jerusalem Anthology https://www.sefaria.org Mishnah Yoma Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Once the ark was taken away there was a stone there from the days of the first prophets, and it was called foundation, elevated three fingers above the ground. Upon it he (the High Priest) would place it (the incense.)